Casing-puller.



No. 743,543.11 PATE-MBD Nov. 10,4903. s. W. MUNN. f

GASING'FULLER.y

APPLIUATION 'FILBD APB.. 7. 1903.

I0 MODEL.

THE mams PETERS co vreorcxm'un., wnsnmcrrou. n. c,

UNITED STAT/Es" Patented November 10, 1903.

PATENT OFFICE.

sILAs w. MUNN, or MANNINGTON, wEs'r VIRGINIA.

CASlNQ-PULLER.

SPECIFICATION forming part of Letters Patent No. 743,543, dated November10, 1903. Application filed April '7, 1903. Serial No. 151,625. (Nomodel.)

To all whom, timmy concern.-

' Be it known that-I, SILAS W. MUNN, a citizen of the United States,residing at Mannington, in the `county of Marion and State of WestVirginia,have invented certain new and useful Improvements inCasing-Fullers, of which the following is a specification.

rlhis invention provides a grapple of novel construction for use inconnection with a headed plug to facilitate the removal of casing fromdeep wells or the lowering of same into place, according to theparticular use of the invention. such constructionand manipulated in amanner to admit of jarring the casing, whereby the same is loosened andthe removal greatly facilitated. i

For a full description of the invention and the merits thereof and alsoto acquire a knowledge of the details of construction of the means foreecting the result'reference is to be had to the following descriptionand drawings hereto attached.

While the essential and characteristic features of the invention aresusceptible of modification, still the preferred embodiment of theinvention is illustrated in the accompanying drawings, in which- Figure1 is a side view of the extracting means in operative relation andapplied to a casing. Fig. 2 is a view similar'V to Fig. 1, showing thegrapple released from the head of the plug. Fig. 3 is an edge or sideViewl of the grapple. Fig. 4 is a viewof the plug as seen vfrom thelower end to show more clearly the vent-openings formed therein. Fig. 5is a plan View ofthe U-shaped catch.

Corresponding and like'parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

. The extracting means comprise,essentially, two parts, a grapple and aheaded plug, the latter being adapted to be tted to the upper end of thecasing or pipe 1 to be extracted or operatedupon. Y

The plug is indicated at 2 and isslightly tapered and externallythreaded' to screw into coupling 3, fitted to the upper end of pipe orcasing 1. Openings 4 are provided in the plug to admit of venting thepipe or casing.

The extract-ing means are ofv Shank `5 projects centrally from plug 2and is provided at its upper end with head 6 of conical form shoulder 7at the base of the head being slightly iiared to permit of automaticdisengagement of the grapple therefrom when the catch is released. Theparts 2, 5, and 6 are preferably'of integral formation, and plug 2 isadapted to be screwed into coupling 3 by a suitable tool, Wrench, orSpanner.

The grapple comprises arms 8 and 9, widened and overlapped at theirupper ends and pivotally connected by means of bolt 10, to which clevis11 is litt-ed and to which theoperating rope orcable is adapted to beattached in any well-known manner. The lower ends of arms 8 and 9 arewidened, as shown at 12, to form inner shoulders 13, which are adaptedto engage under annular shoulder? of head 6, shoulders 13 being beveledor inclined in an opposite direction to shoulder 7, so as to insuredisengagement of the grapple from the head 6 when arms 8 and 9 arereleased. A threaded pin 14 is mounted in a threaded 'opening in one ofthe arms, as 8, and projects inward ltoward arm 9 and is adapted toengage therewith to limit the closing of arms 8 and 9, therebypreventing the gripping ends 12 of the grapple from bearing against thesides of shank 5 with a pressure to prevent free play of the grapple,which is essential to the operativeness of the invention.- A jam-nut 15is iitted to the outer threaded end of pin 14 and secures same in anadjusted position.

Catch 16 is approximately of U form and embraces opposite sides of oneof the arms, as 9, and is pivoted to the gripping end 12 thereof by boltor fastening 17. The arms of catch 16 are adapted to embrace oppositesides of gripping end 12 of arm 8' and are provided at their ends withhooks or shoulders 18 to engage over the projecting ends of A pin 19, soas to hold arms 8 and 9 closed, as indicated in Fig. 1. A lock 2O ispivoted at 21 to arm S and is adapted to engage with catch 16 and holdhooked or shouldered ends 18 in engagement with pin or stops 19. Lock 2Ois adapted to be operated by means of a cord or rope attached thereto ormay be released from catch 16 in any manner.

When the grapple is in engagement with head 6, shoulders 13 and grippingends 12 engage under shoulder 7, and said gripping ends are preventedfrom tightly embracing shank 5 by the pin or stop 14 in the mannerstated. The lock is turned in an upright position, so as to bring oneend in engagement with catch 1G to hold parts 18 in engagement With part19. Vhen it is required to release the casing, pipe, or like article,lock 20 is operated and the grapple jarred or the outer end of catch 16pressed upon by striking a projecting part in any manner found mostexpedient, thereby liberating arms 8 and 9, which separate under thelateral strain incident to engagement of the inclined shoulj ders 13 and7.

A Vital feature of this invention is the contraction and expansion ofthe casing whereby same is readily loosened and its withdrawal from theWeil greatly facilitated. It has been found by practicaldemonstrationthat a casing subjected to linear strain, as when applying force toextract same from the Well, Will stretch longitudinally and contract indiameter proportionately lo the degree of pulling force applied thereto1and when suddenly released said casing Willeontractlength- Wise andexpand circumferentially,thereby enlarging the well and permitting theeasy removal of the casing therefrom.

Having thus described the invention, what is claimed as new isl.Meansforextractingeasingandmanipulating tubing, same comprising incombination a conical-headed ping and a grapple, the latter comprisingpivoted members provided with shouldered gripping ends to engage underthe head of said plug, a catch for holding the pivoted members againstcasual spreading, and a lock for securing said catch, substantially asset forth.

2. Means forextraeting casing and manipulating tubing, same comprisingin combination a conical-headed plug, and a grapple, the lattercomprising pivoted members provided with shouldered gripping ends toengage under the head of said plug, stops projected from the sides ofone of the members, a catch pivoted to the other member and adapted toembrace the sides of both members, and a lock applied to the memberhaving the stops and adapted to hold the catch in engagement therewithagainst casual displacement, substantially as set forth.

3. In means for extracting easing and handlingtnhing, the combination ofaplug adapted to make screw-thread connection with the casing andprovided with vent-openings and Willi an approximately conical-shapedhead, a grapple comprising pivoted members having shouldered grippingends for engagement With the head oi said plug, and a catch forpreventing casual spreading of said pivoted member, substant-iallyas setforth.

4. In combination, a conical-headed plug, a grapple Comprising pivotedmembers provided with gripping ends, a stop applied to one of saidmembers to limit the closing thereof, and a catch for holding thepivoted members in engagement with the headed plug,sub stantially asspecified.

In testimony whereot` I afx my signature in presence of two witnesses.

sILAs W. MUNN. [1.. s]

Witnesses:

J. COCHRANE, J. M. SULLIVAN.

